215254213 has 2 divisors, whose sum is σ = 215254214. Its totient is φ = 215254212.

The previous prime is 215254157. The next prime is 215254229. The reversal of 215254213 is 312452512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174715524 + 40538689 = 13218^2 + 6367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215254213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215254283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107627106 + 107627107.

It is an arithmetic number, because the mean of its divisors is an integer number (107627107).

Almost surely, 2^215254213 is an apocalyptic number.

It is an amenable number.

215254213 is a deficient number, since it is larger than the sum of its proper divisors (1).

215254213 is an equidigital number, since it uses as much as digits as its factorization.

215254213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 215254213 is about 14671.5443290746. The cubic root of 215254213 is about 599.3086602029.

It can be divided in two parts, 2152 and 54213, that added together give a palindrome (56365).

The spelling of 215254213 in words is "two hundred fifteen million, two hundred fifty-four thousand, two hundred thirteen".